Spectra of the 16 of the 31 lens galaxies that were observed with LRIS on the Keck Telescope. In each panel, the black line shows the observed spectrum, and the red line shows the best-fit model from pPXF. The gray regions mark the wavelength range that we excluded from the fitting and typically these regions correspond to atmospheric absorption lines. Each panel also indicates the name of the system, the lens galaxy redshift, and prominent absorption features in the spectra.